Micro and Macro Deformation of Single Crystal NiTi

[+] Author and Article Information
Ken Gall, Martin L. Dunn, Yiping Liu, Paul Labossiere

Department of Mechanical Engineering, University of Colorado, Boulder, CO, 80309

Huseyin Sehitoglu

Department of Mechanical and Industrial Engineering, University of Illinois, Urbana, IL, 61801

Yuriy I. Chumlyakov

Physics of Plasticity and Strength of Materials Laboratory, Siberian Physical and Technical Institute, 634050 Tomsk, Russia

J. Eng. Mater. Technol 124(2), 238-245 (Mar 26, 2002) (8 pages) doi:10.1115/1.1416684 History: Received October 31, 2000; Revised April 18, 2001; Online March 26, 2002
Copyright © 2002 by ASME
Your Session has timed out. Please sign back in to continue.



Grahic Jump Location
Seven different normal orientations considered in the experimental study on single crystal NiTi
Grahic Jump Location
Schematic of the NiTi samples used for compression and indentation testing. The different normal orientations considered are shown in Fig. 1. The compression axis was parallel to the normal orientation, and the micro-indentation was conducted on a surface perpendicular to the normal orientation.
Grahic Jump Location
TEM image of the microstructure of a Ti-50.9 at percent Ni sample with a [210] surface normal after indentation
Grahic Jump Location
Surface normal orientation dependence of micro-indentation tests on single crystal Ti-50.9 at percent Ni. The individual curves are the average of five curves at different spatial locations shown in Fig. 2. Figure 4(b) is a magnified view of the tip of the curves in Fig. 4(a).
Grahic Jump Location
Comparison of micro-indentation tests on single crystal Ti-50.9 at percent Ni and Ti-51.5 at percent Ni for different surface normal orientations
Grahic Jump Location
Comparison of load-unload behavior for Ti-50.9 at percent Ni and Ti-51.5 at percent Ni for (a) [100] and (b) [221] surface normal orientations
Grahic Jump Location
Optical Images of indents for Ti-50.9 at percent Ni on (a) [100] and (b) [221] normal orientations after application and subsequent removal of 1000 mN
Grahic Jump Location
Series of optical images on Ti-50.9 at percent Ni demonstrating that the ridge morphology surrounding the indentor does not have a strong dependence on the relative orientation of the indentor and material (rotated around the surface normal)
Grahic Jump Location
True compressive stress-strain response for samples with the seven different normal orientations in Fig. 1. All tests begin at zero stress and strain, but are moved for presentation clarity.
Grahic Jump Location
Maximum Schmid factor contours in the standard stereographic triangle for the 〈100〉{001} and 〈100〉{011} families of dislocation slip systems
Grahic Jump Location
Maximum compressive Schmid factor contours in the standard stereographic triangle for martensite formation with internal 〈011〉 Type II-1 twins. The calculations were performed in 35 using the energy minimization theory presented in 36. The twinning mode found to dominate in solutionized NiTi is 〈011〉 Type II-1 33839.




Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In